Source : WordNet®

leapfrog
     n 1: advancing as if in the game of leapfrog
     2: a game in which one child bends down and another leaps over
     v 1: jump across; "He leapfrogged his classmates"
     2: progress by large jumps instead of small increments
     [also: {leapfrogging}, {leapfrogged}]

leapfrogging
     See {leapfrog}